GNSS Positioning

Status and Features
Nowadays, GNSS receivers have scores – and often hundreds – of channels, enabling them to track GPS, Glonass, Galileo and Compass signals simultaneously. The whole workflow from satellite tracking to calculating the coordinates of the position in a preferred reference system can be conducted automatically in real time. The price of GNSS receivers has dropped steadily since the first GPS receivers came onto the commercial market in 1982. In conjunction with the latest product survey results for GNSS receivers (available at www.geo matching.com), the author puts today’s GNSS status and features in perspective. By 2020, there will be four fully... (read more)
2012-12-18 01:53:20

Hemisphere GNSS Releases New GNSS RTK Engine

Hemisphere GNSS has announced the launch of Athena, its next-generation GNSS engine. According to the company, the new core engine has been designed to maximise the ability to excel at the rigorous GNSS requirements of multiple market segment customers in machine control, survey and GIS. Athena is developed for application in virtually every environment where high-accuracy GNSS receivers can be used. Hemisphere’s customers have tested and proven Athena’s performance in long baseline, in open-sky environments, under heavy canopy, and in geographic locations experiencing significant scintillation. The company claims the brand-new GNSS RTK engine has one of the most reliably consistent... (read more)
2015-05-08 11:09:16
2017-02-06 10:08:27

New Topcon GNSS Receiver

The new GR-5 GNSS receiver from Topcon Positioning Systems (TPS, USA) introduces its Fence Antenna technology and expanded channel support, providing high tracking sensitivity and multipath rejection in a compact and lightweight package. The device can perform any task for survey, engineering or construction, and its rugged I-beam design can withstand a two-metre (six-foot) drop onto concrete.   The new GR-5 receiver features also include a high-accuracy RTK engine with position updates up to 100Hz; integrated dual communication system with multiple radio and cellular combinations; IP66 dustproof and waterproof rating; MIL-STD shock and vibration tolerance and Bluetooth connectivity. It operates... (read more)
2011-03-21 10:50:17

Versatile GNSS Receiver

Altus Positioning Systems debuts its APS-U GNSS receiver at the Intergeo 2011 conference and trade fair show in Nuremberg, Germany. The APS-U provides multi-frequency capability together with GNSS heading, L-Band positioning and wireless communications, all within a rugged housing that meets military environmental specifications.     With its range of interfaces and 9-30V power input options, the APS-U is considered as a GNSS solution for machine control, agriculture, aerial photogrammetry, heading sensors and military applications.   The design is scalable from a single stand-alone GNSS receiver to full options with heading, wireless links and RTK capability. The unit has an... (read more)
2011-09-27 11:10:06

GNSS Spider v4.0

Leica GNSS Spider v4.0 is a part of the new reference station software update that also includes Leica SpiderWeb v4.0 and Leica SpiderQC v4.0. GNSS Spider v4.0 features an all-new Business Center web portal for all GNSS Services. Additionally advanced support for the GR10 'plug'n'play' reference station receiver, enhancements for GNSS monitoring applications, and numerous other new features, improvements and optimizations increase the positive user experience. Leica GNSS Spider is an integrated software suite for GNSS networks that is modular and scalable. It can be tailored to suit various GNSS surveying, machine automation, GIS, seismic, and structural monitoring applications. Professional... (read more)
2010-08-16 12:00:09

Integrating GNSS and INS

GNSS provides accurate positional information with relatively low integrity, while INS offers position and attitude information subject to drift but with relatively high integrity. Integrating the two provides reliable and accurate information on position and attitude of vehicles on land, at sea, in the air and in space. Integrated GNSS/INS: I know what it is, I know what it does, but how does it work? All sensor data such as aerial imagery acquired from an airborne platform needs to be geo-referenced to be of further use. In treating the subject of exterior orientation we here focus on aerial digital cameras,... (read more)
2008-03-06 12:00:00

High-precision GNSS Receivers

The benefits and availability of new signals and systems
What will the new GNSS signals bring to the user of high-precision receivers? This article provides a brief overview of what users can expect from GNSS systems that are currently in the modernisation/development stage, looking at new signals and emerging techniques including coverage of GNSS developments such as GPS, Galileo, GLONASS and Compass/Beidou. In view of the planned timeframe, what we can do to improve the robustness of our receivers with a special focus on interference and the upcoming solar maximum? The use of high-precision GPS for surveying applications has increased dramatically over the last decade. GPS receivers can provide... (read more)
2011-11-09 03:18:00

Advanced Multi-GNSS Technology

GRACE has taken delivery of a Spirent GSS8000 hardware simulation system, replacing an earlier GSS7700 GPS system. The new system, one of the first to be delivered in the UK, consists of a two chassis, 16 channel GSS8000 system controlled by Spirent's SimGEN software that can simulate current and future GPS signals, including L1, L2 and L5 signals and Galileo E1, E5 and E6 signals as well as WAAS and EGNOS Space Based Augmentation System signals.   The new simulation system will be available to SMEs looking to develop or test new applications. Providing access to the latest GNSS test... (read more)
2009-05-15 11:39:13

Four times GNSS

A Worldwide Race
The Munich Satellite Navigation Summit opened during the first week in March 2009 with a plenary session entitled ‘The Worldwide Race in GNSS’ and closed with a panel discussion on the subject of ‘competition among the Big Four’. Although several speakers did their best to convince attendees that there was no race or competition, it is obvious that four systems serving the same market will be involved in a race for the best technical solutions and engage in fierce competition. If it is indeed a race/competition, let us have a look at the score so far. GPS Since 1978 this... (read more)
2009-06-30 12:00:00
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